Gaya APA

Casadevall, T, J. et al (1980). The 1980 Eruptions of Mount St. Helens, Washington Emission Rates of CO2 from Plume Measurements"" (Tahun 1980). Washington: U.S Geological Survey.

Gaya MLA

Casadevall, Thomas, J.. et al. "The 1980 Eruptions of Mount St. Helens, Washington Emission Rates of CO2 from Plume Measurements""". Tahun 1980 Washington: U.S Geological Survey, 1980. Text.